<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title></title>
		<!--[if lt IE 9]>
    <script src="jquery-1.9.0.js"></script>
<![endif]-->
		<!--[if gte IE 9]><!-->
		<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
		<!--<![endif]-->
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			$(document).ready(function() {
				$("button").click(function() {
					$("li").each(function() {
						alert($(this).text())
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		</script>
	</head>

	<body>

		<button>输出每个列表项的值</button>
		<ul>
			<li>Coffee</li>
			<li>Milk</li>
			<li>Soda</li>
		</ul>

	</body>

</html>